Threaded coupling



May 17, 1927. 1,629,058

. R. A. WILSON THREADED COUPLI NG Filed July 50, 1925 2 Sheets-Sheet l 4 M dXM/a May 17 1927. 1,629,058

R. A. WILSON THREADED IIIIIII \1 G 5 14. Wc'ba/z 0 I I 61cm "e1;

Patented May 17, 1927. i i

UNITED STATES OFFICE.

ROBERT A. .WILSON, o nALLAs, TEXAS, essienon To THE ouInEnsoN CORPORATION, E DALLAS, TEXAS, A conronmuou or DELAWARE.

THREADED COUPLING. I

Application filed July 30, 1925. Serial No. 47,004.

This invention relates to new and useful Fi 3 is an underside view of the pin improvements in threaded couplings. member,

The object of the invention is to provide 41 is aplan view of the box, a coupling of the box and pin type equipped 5 is an enlarged elevation of the im- 5 with thread panels toeffect a coupling and proved pin, v i

an uncoupling ofthe members of th'e'joint Fig. 6 is a similar view at right angles upon a partial rotation of either member. to 5,

A particular object of the invention is to 7. is an enlarged vertical sectional provide a straight pinand a well shaped to view/showing one of the shoes .or extensions 1 receive the same instead of .the usual taresting on the thread seat at the bottom of pered pin and well. thewell of the box, prior to the meshing of Another object of the invention is to prothe threads, and

vide oppositefthr'ea'd panels and to taper Fig. 8 is a vertical sectional view taken the panels of the pin downwardly; while-the on th e line 8 8 of Fig. 4.

panels of the box are tapered upwardly, -In the drawings the numeral 10 desigthus making, for easy and tree insertion of nates a pin member which has a screw the pin in the box. V threaded socket at its upper end to .receive A"further object of the invention is to the usual screw threaded well tubing, stem,

p i h e o the lo d of h pi pipe or other tubular conductor 11, with Which are free from thre s d which will which the joint is used. The member 10 coact with seats in the box, whereby the has a longitudinal bore 12.

' impact and load will be sus ain chb r and The-pin member 10 constitutes one poristr b W i tfll l Surface and tion or element of the joint; while a box not merely the threads. member 13 constitutes the other element or v Ano her object of the invention is to proportion. The lower end ofthe box is screw vide a tapered extension on the lower end of threaded to receive the complementary porthe pin which is free from screw threads tion .141 of the tubing or other conductor 11. and which maybe tapered to center in a The box has'an axial bore 15. The member correspondingly shaped socket in the bot- 10 and box 13 are screwed onto the tubular tom of the well of the box; together with a elementil l and 14: in th usual manner; 1t ieollar at the top of the pin which may also being-a common practice to make the threads be tapered, whereby amplified centering .and comparatively fine and to taper th parts, bearing surfaces assuring a tight coupling This structure may vary according to the are provided. use and the particular conductors which are A construction designed to carry out the to be coupled. It isthe intention to screw invention will be hereinafter described to the member 10 and the box 13 onto the parts 'gether with other features'of the invention. 11 and 14in such a manner that they will The invention will he more readily unr nain so connected when the joint is un derstood from a reading of the following screwed or broken.

40 specification and. by reference to the accorn- The pin is provided with mutilated pa y ng drawings, n wh ch an example of threads 18 arranged n two panels each octhe invention is shown, and wherein: cupy ng approximately one-quarter of the Fig. 1 is an elevation of the pin member circumference of the pin and disposed (ha "of ajjoint constructed in accordance with metricallyopposite each other. These pan- 7 niyinveiition, I els are tapered downwardly and this pro- Fig. 2 is a view of a box constructed in vides 'upwardly'tapere'd gaps 18 between accordance withmy invention, a portion bethe thread panels. The panels are formed ing shown in elevation and a port-ion in secof coarse threads,tlie c-on'volutions of which :tion, are preferably-spaced sufliciently to admit the forming of a second thread of the same pitch, intermediate said convolutions. The second thread is started diametrically opposite the first thread and it has been found expedient to carry extensions of these threads across the upper ends of the gaps to form shoulders 18". From the foregoing it will be seen that one of the threads begins at the lower end of one panel, while the other thread begins at the lower end of the diametrically opposite panel. By this arrangement ample thread bearing is had and a coarse thread is available. It is within the scope of the invention to utilize a single thread.

The well 17 is provided with double threads 19 which are mutilated and formed into diametrically opposite panels. These panels have substantially the same width and taper as the gaps 18 between the panels of the pin. The well also has gaps 19 tapered from top to bottom. Thus when the pin is inserted in the well 17 the panels 18 will readily enter the gaps 19 and the panels 19 will freely enter the gaps 18.

On the lower end of the pin I provide a tapered annular extension 20 fitting 1n a correspondingly shaped socket 21 at the bottom of the well. Above the panels 18 and the shoulder 18 is an upwardly tapered or flared collar 22 having an outwardly directed overhanging right angular shoulder 23. The well has a tapered seat 24 at its upper end for receiving the collar and a flat upper face 25 against which the shoulder rests. The lower end of the extension is cut back to form shoes 26, which have their faces or lower edges on the same pitch as the opposite thread of the following panel. This causes the entrant end of each shoe to drop off by a shoulder 27. These shoes may be cut horizontally across their faces or they may have the same bevel as the threads, but this is subject to variation.

To receive and support the shoes at the bottom of the gaps 19 in the well 17 of the box convolute seats 28 are formed contiguous to the threads 19. Each seat 28 extends convolutely below the panel in its forward path. The seats may be flat or may have the same bevel as the threads and shoes.

hen the pin 16 is inserted in the box the faces of the shoes 26 will engage upon the seats 28. These faces will take the impact and with the seats will sustain the load. In order to start the threads 18 and 19 without lifting the pin after it is inserted and simply by rotating, guides at the lower ends of the gaps in the well 17 must be provided. If merely thread extensions or thread convolutions are used, then they must sustain the impact and load. But by the use of'the edges or faces of the shoes 26 and the seats 28, having the same pitch as the threads it is obvious that when the pin is rotated its thread 18 will be guided into the threads 19 in a free and easy manner.

The coupling is tightened by a quarter rotation of the member 10. This brings the extension 20 and the collar 22 into contact with the socket 21 and the seat 24-, respectively, and takes up any play there might be between the parts. At the same time shoulder 23 binds on the face 25 of the box thus making a tight joint. It is obvious that as the coupling is tightened the frictional contact between the parts will be increased, whereby the box and pin members will be adequately fastened together and water-tight joint will be produced.

What I claim, is: v

1. A coupling comprising in combination, a straight cylindrical pin carried by the pin member and having threads arranged in longitudinal panels on opposite sides, a tapered extension on the lower end of the pin below the threads, guide shoes on the lower edge of the extension, a box having a well shaped to snugly receive said pin and provided with threads arranged in spaced ver tical panels to mesh with the threads of the pin, a tapered socket at the bottom of the well below the threads thereof for receiving the extension of the pin, and guide seats at the bottom of the socket for receiving and supporting the guide shoes.

2. A' coupling comprising in combination, a pin member, a straight cylindrical pin carried by the pin member and having threads arranged in longitudinalpanels on diametrically opposite sides thereof, shoes on the lower end of the pin free from threads, a box having a well shaped to snugly receive said pin and provided with threads arranged in spaced vertical panels to mesh with the threads of the pin, and seats at the bottom of the well of the box 7 between the thread panels thereof for recelving and supporting the shoes when the.

pin is inserted in the box, the thread panels of the pin being tapered along their vertical edges toward the bottom of the pin.

3. A coupling comprising in combination, a pin member, a straight cylindrical pin carried by the pin member and having threads arranged in longitudinal panels on diametrically opposite sides thereof, shoes on the lower end of the pin free from threads, a box having a well shaped to snugly receive said pin and provided with threads arranged in spaced vertical panels to mesh with the threads of the pin, and seats at the bottom of the well of the box between the thread panels thereof for receiving and supporting the shoes when the pin is inserted in the box, the thread panels of the pin being tapered along their vertical edges toward the bottom of the pin and the gaps between the thread panels of the well of the box being flared upwardly for receiving the panels of the pin.

4. As asub-combination in a coupling, a box for receiving a pin having a straight 5 cylindrical surface provided with thread panels tapered along their vertical edges, said box having a straight cylindrical Well provided with vertical thread panels having flaring gaps therebetween, said box having amplified seats at the bottom of its gaps, a socket between the seats and the thread panels, and an annular seat at the upper end of the Well of the box above the thread panels. 7

In testimony whereof I afiix my signature.

' ROBERT A. WILSON. 

